STYLE: Add whatsnew for apply

Author: punitvara

doc/source/whatsnew/v1.3.0.rst

@@ -486,7 +486,7 @@ Other
 - Bug in :meth:`Styler.background_gradient` where text-color was not determined correctly (:issue:`39888`)
 - Bug in :meth:`DataFrame.equals`, :meth:`Series.equals`, :meth:`Index.equals` with object-dtype containing ``np.datetime64("NaT")`` or ``np.timedelta64("NaT")`` (:issue:`39650`)
 - Bug in :func:`pandas.util.show_versions` where console JSON output was not proper JSON (:issue:`39701`)
-
+- Apply fixes of script check_for_inconsistent_pandas_namespace.py on pandas/tests/indexes (:issue:`39992`)
 
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